#ifndef __M_UTIL_H__
#define __M_UTIL_H__
#include "logger.hpp"

#include <iostream>
#include <string>
#include <vector>
#include <memory>
#include <mysql/mysql.h>
#include <jsoncpp/json/json.h>
#include <sstream>
#include <fstream>
#include <websocketpp/server.hpp>
#include <websocketpp/config/asio_no_tls.hpp>

typedef websocketpp::server<websocketpp::config::asio> wsserver_t;

class mysql_util
{
public:
    static MYSQL *mysql_create(const std::string &host, const std::string &username, const std::string &password, const std::string &dbname, uint16_t port = 3306)
    {
        MYSQL *mysql = mysql_init(NULL);
        if (mysql == NULL)
        {
            ELOG("mysql init failed!");
            return NULL;
        }

        if (mysql_real_connect(mysql, host.c_str(), username.c_str(), password.c_str(), dbname.c_str(), port, NULL, 0) == NULL)
        {
            ELOG("connect mysql server failed!");
            mysql_close(mysql);
            return NULL;
        }

        if (mysql_set_character_set(mysql, "utf8") != 0)
        {
            ELOG("set client character failed : %s !", mysql_error(mysql));
            mysql_close(mysql);
            return NULL;
        }

        return mysql;
    }

    static bool mysql_exec(MYSQL *mysql, const std::string &sql)
    {
        int ret = mysql_query(mysql, sql.c_str());
        if (ret != 0)
        {
            ELOG("%s\n", sql.c_str());
            ELOG("mysql query failed : %s !", mysql_error(mysql));
            return false;
        }
        return true;
    }

    static void mysql_destroy(MYSQL *mysql)
    {
        if (mysql != NULL)
        {
            mysql_close(mysql);
        }
        return;
    }
};

class json_util
{
public:
    static bool serialize(const Json::Value &root, std::string &str)
    {
        Json::StreamWriterBuilder swb;
        std::unique_ptr<Json::StreamWriter> sw(swb.newStreamWriter());
        std::stringstream ss;
        int ret = sw->write(root, &ss);
        if (ret != 0)
        {
            ELOG("json serialize failed!");
            return false;
        }
        str = ss.str();
        return true;
    }
    static bool unserialize(const std::string &str, Json::Value &root)
    {
        Json::CharReaderBuilder crb;
        std::unique_ptr<Json::CharReader> cr(crb.newCharReader());
        std::string err;
        bool ret = cr->parse(str.c_str(), str.c_str() + str.size(), &root, &err);
        if (ret == false)
        {
            ELOG("json unserialize failed: %s !", err.c_str());
            return false;
        }
        return true;
    }
};

class string_util
{
public:
    static int split(const std::string &src, const std::string &sep, std::vector<std::string> &res)
    {
        size_t pos, index = 0;
        while (index < src.size())
        {
            pos = src.find(sep, index);
            if (pos == std::string::npos)
            {
                res.push_back(src.substr(index));
                break;
            }
            if (pos == index)
            {
                index += sep.size();
                continue;
            }
            res.push_back(src.substr(index, pos - index));
            index = pos + sep.size();
        }
        return res.size();
    }
};

class file_util
{
public:
    static bool read(const std::string &filename, std::string &body)
    {
        std::ifstream ifs(filename, std::ios::binary);
        if (ifs.is_open() == false)
        {
            ELOG("%s file open failed!", filename.c_str());
            return false;
        }

        size_t fsize = 0;
        ifs.seekg(0, std::ios::end);
        fsize = ifs.tellg();
        ifs.seekg(0, std::ios::beg);
        body.resize(fsize);

        ifs.read(&body[0], fsize);
        if (ifs.good() == false)
        {
            ELOG("%s file read failed!", filename.c_str());
            ifs.close();
            return false;
        }

        ifs.close();
        return true;
    }
};

#endif